Which transport layer protocol provides best-effort delivery service with no acknowledgment
receipt required?

A.
HTTP

B.
IP

C.
TCP

D.
Telnet

E.
UDP

Explanation:
UDP provides a connectionless datagram service that offers best-effort delivery, which means that
UDP does not guarantee delivery or verify sequencing for any datagrams. A source host that
needs reliable communication must use either TCP or a program that provides its own sequencing
and acknowledgment services.